media: venus: fix use after free in vdec_close

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commit a0157b5aa3 upstream.

There appears to be a possible use after free with vdec_close().
The firmware will add buffer release work to the work queue through
HFI callbacks as a normal part of decoding. Randomly closing the
decoder device from userspace during normal decoding can incur
a read after free for inst.

Fix it by cancelling the work in vdec_close.

Cc: stable@vger.kernel.org
Fixes: af2c3834c8 ("[media] media: venus: adding core part and helper functions")
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Acked-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Signed-off-by: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Dikshita Agarwal 2024-05-09 10:44:29 +05:30 • committed by Greg Kroah-Hartman

parent bde9ea30d2

commit da55685247

1 changed files with 1 additions and 0 deletions

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drivers/media/platform/qcom/venus/vdec.c

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